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function Binary_String_To_Number (Str : String) return Natural;
function Binary_String_To_Number (Str : String) return Natural
is
Exponent : Natural := Natural'First;
Result : Natural := Natural'First;
begin
for Elt of reverse Str loop
if Elt = '1' then
Result := Result + 2 ** Exponent;
end if;
Exponent := Exponent + 1;
end loop;
return Result;
end Binary_String_To_Number;
-- Find the result in a set of String which represents a Natural in binary format according to criteria.
-- @param Values Contains all values (String which represents a Natural in binary format) extracted from a file.
-- @param Rate Indicate how many 0s and 1s there are at index "Index".
-- @param Map An array (Called Map because each index corresponds to a filter) that contains for each index (0 and
-- 1) each values of Values that contain a 0 (for index 0 of Map) or a 1 (for index 1 of Map) at index "Index" in
-- the the value in Values.
-- @param Index This index denote the position in the binary string representation of a Natural.
-- @param Strategy The strategy to apply (Most Common, Least Common).
-- @retuns Return the value that match the criteria (Strategy)
function Find_Value_According_To_Criteria (Values : Vector;
Rate : Rate_Arrays;
Map : Binary_Maps;
Index : in out Positive;
Strategy : Strategies)
return Natural;
function Find_Value_According_To_Criteria (Values : Vector;
Rate : Rate_Arrays;
Map : Binary_Maps;
Index : in out Positive;
Strategy : Strategies)
return Natural
is
-- Filter the result for the next recursive call of Find_Value_According_To_Criteria.
-- @param Previous_Filtered_Values List of Cursor (pointing to value in Values) that match the previous
-- criteria.
-- @param Rate Indicate how many 0s and 1s there are at index "Index".
-- @param Map An array (Called Map because each index corresponds to a filter) that contains for each index (0
-- and 1) each values of Values that contain a 0 (for index 0 of Map) or a 1 (for index 1 of Map) at index
-- "Index" in the the value in Values.
procedure Filter (Previous_Filtered_Values : Unbounded_String_Cursor_Vectors.Vector;
Rate : in out Rate_Arrays;
Map : in out Binary_Maps);
procedure Filter (Previous_Filtered_Values : Unbounded_String_Cursor_Vectors.Vector;
Rate : in out Rate_Arrays;
Map : in out Binary_Maps)
is
Current_Value : Unbounded_String;
Binary_Value : Binary_Values;
begin
for Curs : Cursor of Previous_Filtered_Values loop
Current_Value := Element (Curs);
declare
Str : constant String := To_String (Current_Value);
begin
Binary_Value := Binary_Values'Value (Str (Index .. Index));
Map (Binary_Value).Append (Curs);
Rate (Binary_Value) := Rate (Binary_Value) + 1;
Function Definition: procedure Main is
Function Body: use Ada.Execution_Time,
Ada.Real_Time,
Ada.Text_IO;
use Utils;
Nb_Tiles : constant := 1;
subtype Risk_Level is Natural range 1 .. 9;
type Location is record
Line : Natural;
Column : Natural;
end record;
subtype Adjacent_Index is Integer range -1 .. 1;
type Adjacent_Location is record
Line : Adjacent_Index;
Column : Adjacent_Index;
end record;
type Adjacent is (Top, Right, Bottom, Left);
type Adjacent_Array is array (Adjacent) of Adjacent_Location;
-- This Hash function transform a 2 dimensional location to an unique ID using Cantor pairing enumeration.
-- @param Loc A 2 dimensional location
-- @returns Return the corresponding hash
-- @link https://en.wikipedia.org/wiki/Pairing_function#Cantor_pairing_function
function Hash (Loc : Location) return Ada.Containers.Hash_Type is
(Ada.Containers.Hash_Type (((Loc.Line + Loc.Column) * (Loc.Line + Loc.Column + 1) / 2) + Loc.Column));